<template>
    <div>
         <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片 -->
    <el-card>
        <el-row>
            <el-col>
                <el-button type="primary" label="#">添加角色</el-button>
            </el-col>
        </el-row>
        <!-- 角色列表区域 -->
        <el-table :data="roleslist" border stripe>
         <!--展开列-->
        <el-table-column type="expand">
            <template slot-scope="scope">
                <el-row v-for="item1 in scope.row.children" :key="item1.id"
                :class="['bd-bottom']">
                    <!-- 渲染一级权限 -->
                    <el-col :span="5">
                        <el-tag closable @close ="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                         <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 二级权限 -->
                    <el-col :span="19">
                        <!-- 通过for循环渲染二级权限 -->
                        <el-row v-for="item2 in item1.children" :key="item2.id" class="bd-bottom">
                            <el-col :span="6">
                                <el-tag closable type="success" @close ="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                 <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 三级权限 -->
                            <el-col :span="18">
                                <el-tag closable  v-for="item3 in item2.children" :key="item3.id" type="warning" 
                                @close ="removeRightById(scope.row, item3.id)">
                                    {{item3.authName}}
                                </el-tag>
                            </el-col>
                        </el-row>
                    </el-col>
                </el-row>
                <!-- <pre>{{scope.row}}</pre> -->
            </template>
        </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index" ></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="450px">
                <template slot-scope="scope">
                    <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                    <el-button type="warning" icon="el-icon-search" size="mini"
                    @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-card>
     <!--分配权限对话框-->
    <el-dialog
      :visible.sync="setRightDialogVisible"
      title="分配权限"
      width="50%"
      @close ="setRightDialogClosed"
     >
      <!-- 树形控件
          bug点:  写出:data="rolesList"  改成 :data="rightsList"
          #
          注意点: 这个  node-key="id"  id 猜测是从
                  :data="rightsList"绑定的rightsList: []数组对象取出来每单个对象的id
      -->
      <!-- <el-tree ref="treeRef" :data="rightsList"
               :default-checked-keys="defKeys" :default-expand-all="true"
               :props="treeProps" node-key="id" show-checkbox></el-tree>
                -->
                <!-- 树形控件 -->
             <el-tree :data="rightsList" ref="treeRef" :props="treeProps" show-checkbox node-key="id"
            :default-expand-all="true" :default-checked-keys="defKeys"></el-tree>
          <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allowRights()">确 定</el-button>
      </span>
    </el-dialog>
    </div>
</template>
<script>
export default {
    data(){
        return{
            roleslist:[],
            // 分配权限对话框
            setRightDialogVisible:false,
            // 所有权限的数据
            rightsList:[],
            // 树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            // 默认选中的节点
            defKeys:[],
            // 
            roleId:''
        }
    },
    methods:{
      async  getRolesList(){
         const { data:res} = await  this.$http.get('roles')
         if(res.meta.status !== 200){
             return this.$message.error('获取角色列表失败！')
         }
         this.roleslist = res.data;
         console.log(this.roleslist)
        },
        // 根据id删除权限
      async  removeRightById(roleId, rightId){
            // 弹框其实用户是否删除
      const confirmResult = await  this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
           })
         })
            if(confirmResult === 'confirm'){
                console.log('确认了删除')
                console.log(roleId);
                console.log(rightId);
            const {data:res} = await this.$http.delete(`roles/${roleId.id}/rights/${rightId}`)
            console.log(res);
            if(res.meta.status !== 200){
                return this.$message.error('删除权限失败!')
            }
            // 会导致页面关闭
           // this.getRolesList()
           // 选择用
           roleId.children = res.data;
            return this.$message.success('删除权限成功！')
            }

        },
        // 展示修改权限的对话框
     async  showSetRightDialog(role){
         this.roleId = role.id;
      const {data:res} = await this.$http.get('rights/tree')
      console.log(res);
      if(res.meta.status !==200) return this.$message.error('获取权限数据失败')
      // 把获取到的数据保存到rightslist中
      this.rightsList = res.data;
      // 获取三级节点 
        this.getLeafKeys(role, this.defKeys)
      console.log(this.rightsList);
      this.setRightDialogVisible =true;
        },
        // 获取三级节点的key值
        // 通过递归获取所有三级节点   看看有没有children属性
        getLeafKeys(node,arr){
            if(!node.children){
                return arr.push(node.id);
            }
            node.children.forEach(item=>{
                this.getLeafKeys(item,arr);
            })
        },
        // 监听 分配权限对话框的关闭事件
        setRightDialogClosed () {
           this.defKeys = []
    },  
    // 点击分配权限 并上传服务器  通过展开运算符
  async  allowRights(){
        const keys =[
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        console.log(keys);
        const idStr = keys.join(',')
        const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
        if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      } else {
          // 刷新列表
        this.getRolesList()
        this.setRightDialogVisible = false
        return this.$message.success('分配权限成功!')
      }
    }
    },
    created(){
        this.getRolesList()
    }
}
</script>
<style scoped>
.el-tag{margin-top:10px; margin-left:10px;}
.bd-top{
    border-top:1px solid #eee;
}
.bd-bottom{
    border-bottom:1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>